30-Day Cloud & DevOps Challenge: Day 10 - Docker in CI

Integrating Docker into your Continuous Integration (CI) pipeline is a crucial step towards automating the deployment process and ensuring consistency across different environments. Here’s a detailed guide based on your outlined steps to help you integrate Docker with Jenkins for building microservices.

Step 1: Ensure Docker Access in Jenkins

Before proceeding, ensure that the Jenkins container has access to the host's Docker daemon. This is typically achieved by mounting the Docker socket from the host into the Jenkins container.

Mounting Docker Socket

Edit your docker-compose.yml file to include the following:

yaml
 
1version: '3'
2services:
3  jenkins:
4    image: jenkins/jenkins:lts
5    ports:
6      - "8080:8080"
7      - "50000:50000"
8    volumes:
9      - /var/run/docker.sock:/var/run/docker.sock

This mounts the Docker socket from your host machine into the Jenkins container, allowing it to interact with the Docker daemon.

Install Docker CLI in Jenkins Container

Ensure that the Docker command-line interface (CLI) is installed inside the Jenkins container. You can do this by running:

sh
 
1docker exec jenkins
2
3[Read the full article at DEV Community](https://dev.to/michellewanjiru/30-day-cloud-devops-challenge-day-10-docker-in-ci-1d3a)
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